Valve Covers, Valve Cover Breathers & Components

A valve cover is a piece of formed or stamped metal (or even plastic) that bolts to the top of an engine cylinder head, protecting the moving parts of the valvetrain, such as rocker arms, springs and pushrods, from contamination and foreign objects. It also provides a block to the oil slung from the valvetrain inside the cylinder head, keeping oil from escaping the engine.

If you're wondering how to paint a valve cover, first remove it from the engine, along with any components attached to it, like a valve breather or valve cover breather cap (possibly with PCV valve). Next, clean it of any debris, waxes, oil, etc. Then, scuff it up with Scotch Brite or sandpaper to help the primer and paint stick, and apply a high-temperature/engine paint primer following the instructions included with it. Then, apply high-temperature/engine paint with your color choice following its instructions. After the paint is cured, you can sand the finish and/or apply a high-temp clear coat to improve the looks, or leave it as is.

When learning how to clean a valve cover, first remove it from the engine. This may involve removing any valve cover breathers or valve cover components installed in it. Then, use a good engine cleaner spray along with a soft bristle brush to remove all dirt, oil and debris. Next, rinse it off with water and let it dry completely. Finally, reinstall the valve cover.

Valve cover removal installation varies. Depending on the engine or vehicle, additional parts may need to be moved before removing the valve covers. This may include push-in valve cover filters, valve cover vents or a valve cover breather. Typically, valve covers are secured to the cylinder heads with bolts, a gasket or a seal sandwiched underneath the covers. A wrench or socket with extension usually will help remove the cover. For the correct removal instructions, we recommend following the vehicle or engine shop manual.